Standardize usage of virtual/override/final in mojo/

mojo/public/cpp/bindings/tests/connector_unittest.cc

Index: mojo/public/cpp/bindings/tests/connector_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/connector_unittest.cc b/mojo/public/cpp/bindings/tests/connector_unittest.cc
index b90faf6a4281b205286fb61be7db407643d70629..1e1c6efbd6cbb9632d4e6f60d1d5d761addf4403 100644
--- a/mojo/public/cpp/bindings/tests/connector_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/connector_unittest.cc
@@ -21,7 +21,7 @@ class MessageAccumulator : public MessageReceiver {
  public:
   MessageAccumulator() {}
 
-  virtual bool Accept(Message* message) override {
+  bool Accept(Message* message) override {
     queue_.Push(message);
     return true;
   }
@@ -39,7 +39,7 @@ class ConnectorDeletingMessageAccumulator : public MessageAccumulator {
   ConnectorDeletingMessageAccumulator(internal::Connector** connector)
       : connector_(connector) {}
 
-  virtual bool Accept(Message* message) override {
+  bool Accept(Message* message) override {
     delete *connector_;
     *connector_ = 0;
     return MessageAccumulator::Accept(message);
@@ -54,7 +54,7 @@ class ReentrantMessageAccumulator : public MessageAccumulator {
   ReentrantMessageAccumulator(internal::Connector* connector)
       : connector_(connector), number_of_calls_(0) {}
 
-  virtual bool Accept(Message* message) override {
+  bool Accept(Message* message) override {
     if (!MessageAccumulator::Accept(message))
       return false;
     number_of_calls_++;